Population ecology grade 10
Published on: Mar 4, 2016
Transcripts - Population ecology grade 10
ecology is the study of
population in relation to
environment, including environmental
influence on density and distribution, age
structure and population size.
is the a group of individuals of
the same species, living in the same
area, at he same time.
Density is the total number of individual
per unit area.
Dispersion is the pattern amongst
individuals within boundaries of the
POPULATION SIZE IS PRIMARILY
pattern of dispersion
2. PATTERNS OF DISPERSION
Environmental and social factors influence spacing of
individuals in a population:
1. In a clumped dispersion, individuals
aggregate in patches. A clumped dispersion may
be influenced by resource availability and behaviour.
A uniform dispersion is one in which
individuals are evenly distributed. It may be
influenced by social interactions such as
In a random dispersion, the position of each
individual is independent of other individuals.
It occurs in the absence of strong attractions or
An organism that is highly interactive with other
members of its species is said to be a social
All mammals (and birds) are social to the extent
that mothers and offspring bond.
A few species, notably insects (ants, bees wasps
and termites) show an extreme form of
sociality, involving highly organized
societies, with individual organisms specialized
for distinct roles.
This form of social behaviour is referred to as